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The anterior cruciate ligament (ACL) injury is common in athletes aged 18 to 35. ACL reconstruction (ACLR) aims to restore knee stability in the process of returning to sports. Post-surgical rehabilitation focuses on optimizing biomechanical parameters, with neuromuscular and functional tests assessing muscle strength, proprioception, and dynamic stability. Isokinetic allows the measurement of muscle strength symmetry and proprioception, while the single-leg hop and landing tasks assess functional stability and are predictive of sports resumption and injury prevention. Despite progress, concerns remain about neuromuscular factors impacting knee stability, especially during landings, which can increase the risk of secondary ACL injuries.
This study proposes examining knee strength and proprioception using isokinetic dynamometry, alongside biomechanical assessments from functional tests, to explore their relationship to biomechanical features during landings, at 6-to-12 months post-ACL reconstruction. The hypothesis is that better muscle strength and proprioception correlate with improved knee control during landing tasks.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| ACL reconstruction group | All sports patients who had a muscle evaluation at 6 to 12 months after ACLR since March 2024 |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Isokinetic neuromuscular assessment | Diagnostic Test | All sports patients who had a muscle evaluation in addition to functional testing at 6-12 months after ACLR since March 2024 |
|
| Measure | Description | Time Frame |
|---|---|---|
| Passive proprioceptive evaluation | Measurement of knee proprioception by the passive repositioning technique (JPS, in degrees) on isokinetic dynamometer. | One measurement during the visit at 6 to 12 months after surgery |
| Strength | Measurement of knee extensors and flexors peak strength (in newton.meter, Nm) on isokinetic dynamometer. | One measurement during the visit at 6 to 12 months after surgery |
| Single Hop test | Measurement of knee position during landing from a single leg hop task | One measurement during the visit at 6 to 12 months after surgery |
| Single-leg landing task | Measurement of knee position during landing from a 30-cm box | One measurement during the visit at 6 to 12 months after surgery |
| Measure | Description | Time Frame |
|---|---|---|
| Single Hop for Distance | The total distance is recorded (in cm) | One measurement during the visit at 6 to 12 months after surgery |
| ACL-RSI questionnaire (Anterior Cruciate Ligament-Return to Sport after Injury) |
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Inclusion Criteria:
Exclusion Criteria:
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All sports patients included in the sport medicine follow-up protocole with isokinetic muscular assessment at 6-12 months after ACL reconstruction surgery since March 2024 in the sports medicine department (Return To Sport Process)
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| CHU Caen Normandie | Recruiting | Caen | 14000 | France |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 40194659 | Derived | Faivre O, Prum G, Hulet C, Drigny J. Improved hamstring strength and knee position sense are associated with enhanced landing mechanics after anterior cruciate ligament reconstruction. J ISAKOS. 2025 Jun;12:100858. doi: 10.1016/j.jisako.2025.100858. Epub 2025 Apr 5. |
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| ID | Term |
|---|---|
| D000070598 | Anterior Cruciate Ligament Injuries |
| ID | Term |
|---|---|
| D007718 | Knee Injuries |
| D007869 | Leg Injuries |
| D014947 | Wounds and Injuries |
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The ACL-RSI measures the patient's understanding of his knee. It comprises 12 questions with a score of 1 to 10 for each
| One measurement during the visit at 6 to 12 months after surgery |
| Landing Error Scoring System (LESS) | The LESS (Landing Error Scoring System) scale is a 13-item tool used to assess landing technique during a hop task. | One measurement during the visit at 6 to 12 months after surgery |